LOWER MONUMENTAL DAM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(454841) LOWER MONUMENTAL DAM
From Year=1962 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 40 80 203 368 647 866 1126 1109 804 461 141 49 5894
40 S 40 119 322 690 1337 2204 3329 4438 5242 5704 5845 5894 5894
45 M 9 22 88 221 492 716 971 954 654 310 52 10 4499
45 S 9 32 119 340 832 1549 2519 3473 4127 4437 4489 4499 4499
50 M 1 3 28 100 339 566 816 799 504 174 11 1 3341
50 S 1 4 32 132 471 1037 1853 2652 3156 3330 3340 3341 3341
55 M 0 0 5 33 201 417 661 644 358 75 1 0 2395
55 S 0 0 5 38 239 656 1317 1961 2319 2394 2395 2395 2395
60 M 0 0 0 7 99 274 506 489 222 25 0 0 1623
60 S 0 0 0 8 107 381 887 1376 1598 1623 1623 1623 1623
Corn Growing Degree Days
50 M 11 38 111 206 382 536 714 699 498 273 52 12 3532
50 S 11 50 160 366 748 1284 1997 2696 3195 3467 3520 3532 3532
M = Monthly Data
S - Running sum of monthly data.
Growing Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
Table updated on Jul 28, 2006
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu